31
Monitoring (Polling)
To meet the EN50131 requirements for monitoring on Grade 2, 3 and 4 instal-
lations, the DualCom sends regular polling calls to the GPRS Polling Server on
the Radio path, on the PSTN path and where fitted, on the LAN (IP) path.
The Installer should ensure that a reporting action has been agreed with the
ARC for path failure reports from the Gemini network Polling Server.
To make installation easier, the DualCom is supplied with polling disabled for 45
minutes. Polling will start automatically 45 minutes after power-up or reset.
For some testing functions it may be advantageous to turn Radio polling off.
See Appendix 1, Table 30 & 31. Polling will be re-enabled by the A & B buttons
or when power is cycled or the DualCom is reset.
Remember to re-enable polling when testing is completed.
21CN Mode
Between 2008 and 2015 the UK PSTN telephone system will be upgraded. This
is expected to impact every telephone line in UK upon the changeover from the
current equipment to the new 21CN equipment.
In order to ensure that your customer is not affected at the time of changeover,
DualCom’s in Grade 2 installations may be temporarially upgraded to G3 per-
formance. This will ensure that your customer does not suffer any reduction in
their security.
When the upgrade schedule and other information becomes available, addi-
tions will be made to the CSL DualCom website: www.csldual.com
Table 6
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